gistfile1.txt

class YourTask extends AsyncTask {
    ...
    @Override
    protected void onPostExecute(Boolean result) {
        handler.sendEmptyMessage(0);
    }
}

Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case 0:
            // YourTask完成
            break;
        }
    }
}
自行將三個工作檢查寫在Hanlder中